Rust init opentracing

init_tracer.rs

fn init_tracer() -> Result<(), tracing_subscriber::util::TryInitError> {                                                               
    let exporter_config = opentelemetry_zipkin::ExporterConfig::builder()                                                              
        .with_service_name("service".to_string())                
        .with_service_endpoint("127.0.0.1:9411".parse().expect("valid sockaddr"))                                                      
        .build();                                                                                                                      
                                                                                                                                       
    let exporter = opentelemetry_zipkin::Exporter::from_config(exporter_config);                                                       
                                                                                                                                       
    let provider = opentelemetry::sdk::Provider::builder()                                                                             
        .with_simple_exporter(exporter)                                                                                                
        .build();                                                  
    let tracer = provider.get_tracer("tracer");                                                                                   
                                                                                                                                       
    let telemetry = tracing_opentelemetry::layer().with_tracer(tracer);                                                                
    tracing_subscriber::registry()                                 
        .with(telemetry)                                                                                                               
        .try_init()                                                                                                                    
}                                                                                                                                      

This seems to be much more complicated than it needs to be.

Why?